Fried component in Velodyne sub

[struts]

Hi there,

A friend of mine has a Velodyne sub which has developed a problem. Opening it up it appears that one of the components on the servo is fried and has started oozing:



He called Velodyne but they want to sell him a new board for over $500. Seems to me that component is likely the problem and I'd just replace it if I knew what it was. The text on the side is "917Td701".

The sub is a model HGS12BGE from 1999.

Thanks in advance for any clues

[db!]

That appears to be a small cermet trimpot. These do not contain electrolytes or anything that could leak.The black/browning material could actually just be epoxy to prevent the trimpot from rotating. Are you sure this part is actually fried/the culprit?

[struts]

Thanks db! My friend confirmed it has 3 pins so that would figure. Back to the drawing board..

[davygrvy]

Check the piezo element that's located in the cone. There should be a couple extra wires (probably from that board) going to it. The piezo is used as a stress pickup to determine acceleration for the servo control logic. For me, I've seen many dead ones.

Consider returning it to the company if they offer a repair service, as it will require alignment after replacing, if it's even possible to get in there without damaging the dustcap.

Good luck. How to test it, I don't know. Try here as a stating place: Piezoelectricity - Wikipedia, the free encyclopedia